--- a/c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/HotSpotRegisterConfig.java	Tue Nov 09 17:40:15 2010 +0100
+++ b/c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/HotSpotRegisterConfig.java	Fri Nov 12 16:11:41 2010 +0100
@@ -67,6 +67,23 @@
     private final CiRegister[] xmmParameterRegisters = {xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7};
     private final CiRegister[] allParameterRegisters;
 
+    public static final CiRegisterSaveArea RSA;
+    static {
+        int offset = 0;
+        CiRegister[] rsaRegs = {
+            rax,  rcx,  rdx,   rbx,   rsp,   rbp,   rsi,   rdi,
+            r8,   r9,   r10,   r11,   r12,   r13,   r14,   r15,
+            xmm0, xmm1, xmm2,  xmm3,  xmm4,  xmm5,  xmm6,  xmm7,
+            xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15
+        };
+        Map<CiRegister, Integer> registerOffsets = new HashMap<CiRegister, Integer>(rsaRegs.length);
+        for (CiRegister reg : rsaRegs) {
+            registerOffsets.put(reg, offset);
+            offset += reg.isFpu() ? 16 : 8;
+        }
+        RSA = new CiRegisterSaveArea(offset, registerOffsets, 8);
+    }
+
     public HotSpotRegisterConfig(HotSpotVMConfig config) {
         if (config.windowsOs) {
             generalParameterRegisters = new CiRegister[] {rdx, r8, r9, rdi, rsi, rcx};
@@ -185,6 +202,10 @@
         return rsp;
     }
 
+    public CiRegisterSaveArea getRSA() {
+        return RSA;
+    }
+
     @Override
     public String toString() {
         String res = String.format(